Fix invocation of static methods of QCoreApplication and subclasses

Replace qApp-> by static invocation where applicable.

Change-Id: I24df2689b0df8609d1aa8e7c9c9da75ed94a4bab
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>

8 files changed, 23 insertions, 23 deletions

diff --git a/doc/src/howtos/scalabilityintro.qdoc b/doc/src/howtos/scalabilityintro.qdoc
index 8d8b99cb..cd823ce9 100644
--- a/doc/src/howtos/scalabilityintro.qdoc
+++ b/doc/src/howtos/scalabilityintro.qdoc
@@ -340,10 +340,10 @@
     qreal refDpi = 216.;
     qreal refHeight = 1776.;
     qreal refWidth = 1080.;
-    QRect rect = qApp->primaryScreen()->geometry();
+    QRect rect = QGuiApplication::primaryScreen()->geometry();
     qreal height = qMax(rect.width(), rect.height());
     qreal width = qMin(rect.width(), rect.height());
-    qreal dpi = qApp->primaryScreen()->logicalDotsPerInch();
+    qreal dpi = QGuiApplication::primaryScreen()->logicalDotsPerInch();
     m_ratio = qMin(height/refHeight, width/refWidth);
     m_ratioFont = qMin(height*refDpi/(dpi*refHeight), width*refDpi/(dpi*refWidth));
     \endcode
@@ -446,7 +446,7 @@
     code to actually use the @2x versions:
 
     \code
-    if ( qApp->primaryScreen()->devicePixelRatio() >= 2 ) {
+    if ( QGuiApplication::primaryScreen()->devicePixelRatio() >= 2 ) {
         imageVariant = "@2x";
     } else {
         imageVariant = "";
diff --git a/doc/src/platforms/windows.qdoc b/doc/src/platforms/windows.qdoc
index d809c12b..c4ba7e56 100644
--- a/doc/src/platforms/windows.qdoc
+++ b/doc/src/platforms/windows.qdoc
@@ -881,8 +881,8 @@
 
     An alternative to putting the plugins in the plugins subdirectory
     is to add a custom search path when you start your application
-    using QApplication::addLibraryPath() or
-    QApplication::setLibraryPaths().
+    using QCoreApplication::addLibraryPath() or
+    QCoreApplication::setLibraryPaths().
 
     \snippet snippets/code/doc_src_deployment.cpp 19
 
@@ -1079,7 +1079,7 @@
 
     \snippet snippets/code/doc_src_deployment.qdoc 54
 
-    Then qApp->libraryPaths() would return something like this:
+    Then QCoreApplication::libraryPaths() would return something like this:
 
     \list
     \li \c{C:/customPath/plugins}
@@ -1088,10 +1088,10 @@
     \endlist
 
     The executable will look for the plugins in these directories and
-    the same order as the QStringList returned by qApp->libraryPaths().
-    The newly added path is prepended to the qApp->libraryPaths() which
+    the same order as the QStringList returned by QCoreApplication::libraryPaths().
+    The newly added path is prepended to the QCoreApplication::libraryPaths() which
     means that it will be searched through first. However, if you use
-    qApp->setLibraryPaths(), you will be able to determine which paths
+    QCoreApplication::setLibraryPaths(), you will be able to determine which paths
     and in which order they will be searched.
 
     The \l{How to Create Qt Plugins} document outlines the issues you
diff --git a/doc/src/snippets/code/doc_src_deployment.cpp b/doc/src/snippets/code/doc_src_deployment.cpp
index 5c15d1df..0932f70d 100644
--- a/doc/src/snippets/code/doc_src_deployment.cpp
+++ b/doc/src/snippets/code/doc_src_deployment.cpp
@@ -39,18 +39,18 @@
 ****************************************************************************/
 
 //! [9]
-qApp->addLibraryPath("/some/other/path");
+QCoreApplication::addLibraryPath("/some/other/path");
 //! [9]
 
 
 //! [19]
-qApp->addLibraryPath("C:\some\other\path");
+QCoreApplication::addLibraryPath("C:/some/other/path");
 //! [19]
 
 
 //! [49]
-QDir dir(QApplication::applicationDirPath());
+QDir dir(QCoreApplication::applicationDirPath());
 dir.cdUp();
 dir.cd("plugins");
-QApplication::setLibraryPaths(QStringList(dir.absolutePath()));
+QCoreApplication::setLibraryPaths(QStringList(dir.absolutePath()));
 //! [49]
diff --git a/doc/src/snippets/code/doc_src_deployment.qdoc b/doc/src/snippets/code/doc_src_deployment.qdoc
index feb3bb74..2395cca2 100644
--- a/doc/src/snippets/code/doc_src_deployment.qdoc
+++ b/doc/src/snippets/code/doc_src_deployment.qdoc
@@ -377,5 +377,5 @@ otool -L MyApp.app/Contents/MacOS/MyApp
 
 
 //! [54]
-qApp->addLibraryPath("C:/customPath/plugins");
+QCoreApplication::addLibraryPath("C:/customPath/plugins");
 //! [54]
diff --git a/doc/src/snippets/code/doc_src_i18n.cpp b/doc/src/snippets/code/doc_src_i18n.cpp
index 83b59bf1..88bd1302 100644
--- a/doc/src/snippets/code/doc_src_i18n.cpp
+++ b/doc/src/snippets/code/doc_src_i18n.cpp
@@ -57,7 +57,7 @@ void some_global_function(LoginWidget *logwid)
 void same_global_function(LoginWidget *logwid)
 {
     QLabel *label = new QLabel(
-                qApp->translate("LoginWidget", "Password:"), logwid);
+                QCoreApplication::translate("LoginWidget", "Password:"), logwid);
 }
 //! [1]
 
@@ -87,8 +87,8 @@ QString FriendlyConversation::greeting(int type)
 
 QString global_greeting(int type)
 {
-    return qApp->translate("FriendlyConversation",
-                           greeting_strings[type]);
+    return QCoreApplication::translate("FriendlyConversation",
+                                       greeting_strings[type]);
 }
 //! [3]
 
@@ -185,7 +185,7 @@ void some_global_function(LoginWidget *logwid)
 void same_global_function(LoginWidget *logwid)
 {
     QLabel *label = new QLabel(
-            qApp->translate("LoginWidget", "Password:"),
+            QCoreApplication::translate("LoginWidget", "Password:"),
             logwid);
 }
 //! [13]
diff --git a/doc/src/snippets/code/doc_src_linguist-manual.cpp b/doc/src/snippets/code/doc_src_linguist-manual.cpp
index 78e5d7df..acdf5e86 100644
--- a/doc/src/snippets/code/doc_src_linguist-manual.cpp
+++ b/doc/src/snippets/code/doc_src_linguist-manual.cpp
@@ -107,7 +107,7 @@ void some_global_function(LoginWidget *logwid)
 void same_global_function(LoginWidget *logwid)
 {
     QLabel *label = new QLabel(
-            qApp->translate("LoginWidget", "Password:"),
+            QCoreApplication::translate("LoginWidget", "Password:"),
             logwid);
 }
 //! [14]
@@ -138,8 +138,8 @@ QString FriendlyConversation::greeting(int greet_type)
 
 QString global_greeting(int greet_type)
 {
-    return qApp->translate("FriendlyConversation",
-                            greeting_strings[greet_type]);
+    return QCoreApplication::translate("FriendlyConversation",
+                                       greeting_strings[greet_type]);
 }
 //! [16]
 
diff --git a/doc/src/snippets/signalsandslots/signalslotsyntaxes.cpp b/doc/src/snippets/signalsandslots/signalslotsyntaxes.cpp
index 1bec5407..d38aa0c7 100644
--- a/doc/src/snippets/signalsandslots/signalslotsyntaxes.cpp
+++ b/doc/src/snippets/signalsandslots/signalslotsyntaxes.cpp
@@ -117,7 +117,7 @@ DemoWidget::DemoWidget(QWidget *parent) : QWidget(parent) {
             this, SLOT(printNumber()));
 
     // ERROR: Compiler requires compatible arguments
-    connect(qApp, &QApplication::aboutToQuit,
+    connect(qApp, &QCoreApplication::aboutToQuit,
             this, &DemoWidget::printNumber);
 }
 //! [defaultparams]
diff --git a/doc/src/snippets/widgets-tutorial/notepad/notepad.cpp b/doc/src/snippets/widgets-tutorial/notepad/notepad.cpp
index 2d29e385..a0e85be5 100644
--- a/doc/src/snippets/widgets-tutorial/notepad/notepad.cpp
+++ b/doc/src/snippets/widgets-tutorial/notepad/notepad.cpp
@@ -63,7 +63,7 @@ Notepad::~Notepad()
 //! [1]
 void Notepad::on_quitButton_clicked()
 {
-    qApp->quit();
+    QCoreApplication::quit();
 }
 //! [1]